Kurahara
Hiroaki Kurahara, Kumamoto-Shi JP
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20130068034 | MICROMATERIAL STRAIN MEASUREMENT APPARATUS AND METHOD THEREFOR TECHINICAL FIELD - A measurement unit for tensile or compressive stress can includes a CCD camera for detecting an interference light, the interference light being formed with a measurement beam from a measured region and a reference beam from a reference mirror. A first objective lens can have the reference mirror. An image processing apparatus can measure the three-dimensional shape of the measured region from the position of the first objective lens at which the interference light provides the maximum contrast and can measure the distance between two gauge points on the basis of the three-dimensional shape. When strain is generated on a micromaterial, the strain against the measured tensile stress is measured on the basis of the tensile stress and the distance between the two gauge points. | 03-21-2013 |
Kazuhiro Kurahara, Moriya-Shi JP
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20080291035 | Pressure Switch - In a pressure switch, a joint coupling holder is mounted via an opening in a case constituting a housing. A plurality of engagement pawls that make up the joint coupling holder engages with a bottom of the case. Further, by inserting a cap into a recess of the joint coupling holder, the engaged state of the engagement pawls is maintained, whereby the housing, which is made from a resin material, and the joint coupling holder are strongly and rigidly connected together. | 11-27-2008 |
Rui Kurahara, Tokyo JP
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20160047833 | Sample Rack Conveying Unit and Automatic Analysis System - A sample rack conveying unit | 02-18-2016 |
Shuichi Kurahara, Ibaraki-Ken JP
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20090031783 | DROP TEST APPARATUS - Drop test apparatus, for performing a drop impact test by dropping an article to be tested on a landing surface in a free fall state and by colliding the article with the landing surface, is equipped with a holder for holding the article and an acceleration means for accelerating the holder. The holder with the article is accelerated in the dropping direction of the article by the acceleration means, and the article is released from the holder at the point when the holder is accelerated to a predetermined speed and is dropped to the landing surface. The reproducibility of the test can be enhanced due to an elimination of an unstable factor such as frictional resistance when the holder is dropped, and a higher test in a dropping height without scaling-up the apparatus can be achieved. | 02-05-2009 |
Yoshimi Kurahara, Ibaraki JP
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20120038230 | ROTATING ELECTRIC MACHINE AND PRODUCTION METHOD FOR ROTATING ELECTRIC MACHINE - A rotating electric machine includes: a stator in which a stator coil is mounted to a plurality of slots formed on a stator core; and a rotor that is rotatably disposed inside the stator. A slot groove, having a predetermined depth and a predetermined width from an end face of the stator core and forming a space between the stator coil and the stator core, is formed around each of the plurality of slots. The stator coil includes a straight-shaped straight section which is inserted into the slot and is provided with an insulating material, and a coil end section which extends outside of the slot and is bent at a same height as the end face of the stator core. | 02-16-2012 |
Yoshimi Kurahara, Hitachi JP
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20110156504 | MOTOR AND METHOD FOR MANUFACTURING THE SAME - A motor comprises a rotor having a permanent magnet, a stator core having a stator coil and a frame for accommodating therein the rotor and the stator core. The stator coil has a shape of a concentrated winding being fitted and wound to a tooth of an one-slot core as one slot per one phase in the stator core and has a molded high thermal conductivity resin for covering the stator coil. Both end faces of the stator coil are respectively provided with insulating and heat-transfer layers which are constituted by a part of the molded high thermal conductivity resin, and each of the electric insulating and heat-transfer layers is put in contact with the frame. | 06-30-2011 |
20110184672 | INSULATION DIAGNOSTIC UNIT AND ALGORITHM FOR ELECTRIC MACHINE, AND EQUIPMENT INCLUDING THE DIAGNOSTIC UNIT - Partial discharge occurring in a continuously operated electric machine is monitored all the time. Even when the electric machine is mounted in mobility equipment, the partial discharge is monitored all the time. An insulation diagnostic unit includes: an instrument that performs spectrum analysis on an output of a sensor disposed near the electric machine; a data table in which an output of a load detection method for the electric machine and an output of the spectrum analysis instrument are recorded; a first routine that obtains a correlation coefficient on the basis of plural data items concerning the magnitudes of a spectrum relevant to a specific frequency, which is obtained by the spectrum analysis instrument, out of data items recorded in the data table, and plural data items of a load obtained at the times of measurement of the plural data items; and a second routine that classifies the noted spectrum relevant to the specific frequency into a spectrum of an environmental electromagnetic wave or a spectrum of an electromagnetic wave due to partial discharge from the electric machine on the basis of the value of the correlation coefficient obtained by the first routine. | 07-28-2011 |
Yoshimi Kurahara, Tokyo JP
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20140084713 | Rotating Electric Machine and Method of Manufacturing Same - A rotating electric machine includes: a stator including a stator core, slots provided in the stator core at equal intervals along the circumferential direction, and coils placed in the stator slots and configured to generate a rotating magnetic field; and a rotor rotatably provided with a predetermined rotation gap between the stator core and the rotor, wherein the rotating electric machine further comprising a first varnish applied between the slots in the stator core and the coils for impregnation, and a second varnish applied directly onto enamel coating of the coils outside of the slots in the axial direction, the first varnish is a thermosetting varnish having a shear bond strength of a flat wire between the coils and the varnish is higher than that of the second varnish, and the second varnish is a thermosetting varnish having a glass transition temperature of approximately 104° C. or lower and the glass transition temperature of the second varnish by the DMA method is lower than that of the first varnish. | 03-27-2014 |
20140117805 | Rotating Machine and Insulator and Slot Liner for Rotating Machine - A rotating machine includes a stator including a stator core having a plurality of slots arrayed in the circumferential direction, a plurality of conductors for stator winding wire inserted respectively into the slots, and slot liners comprising a sheet-shaped insulator surrounding the conductors for stator winding wire; and a rotor rotatably arranged concentrically with the stator. In the rotating machine the slots of which are filled with an electrically insulative resin, concavo-convex is formed on both the top and bottom surfaces of the slot liners. | 05-01-2014 |
20140183985 | Rotating Electric Machine and Method for Manufacturing Stator Coil of Rotating Electric Machine - A large peeling force due to heat occurs at the boundary between the insulation coating over the coil end and the coil conductor when the stator coil emits heat and reaches a high temperature due to the high output of the rotating electric machine that causes the insulation coating to peel from the conductor consequently causing insulation defects. A sloped surface is formed on the insulation coating so that the thickness of the tip of the insulation coating on the coil end has a shape having a slope that becomes gradually thinner towards the welded coupling section made by welding the conductor. | 07-03-2014 |